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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.databinding.jaxb;
import java.io.StringReader;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.databinding.BaseTransformer;
import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;
import org.apache.tuscany.sca.databinding.xml.XMLStringDataBinding;
/**
*
* @version $Rev$ $Date$
*/
public class String2JAXB extends BaseTransformer<String, Object> implements
PullTransformer<String, Object> {
private JAXBContextHelper contextHelper;
public String2JAXB(ExtensionPointRegistry registry) {
contextHelper = JAXBContextHelper.getInstance(registry);
}
public Object transform(final String source, final TransformationContext context) {
if (source == null) {
return null;
}
try {
JAXBContext jaxbContext = contextHelper.createJAXBContext(context, false);
StreamSource streamSource = new StreamSource(new StringReader(source));
Unmarshaller unmarshaller = contextHelper.getUnmarshaller(jaxbContext);
try {
Object result = unmarshaller.unmarshal(streamSource, JAXBContextHelper.getJavaType(context.getTargetDataType()));
return JAXBContextHelper.createReturnValue(jaxbContext, context.getTargetDataType(), result);
} finally {
contextHelper.releaseJAXBUnmarshaller(jaxbContext, unmarshaller);
}
} catch (Exception e) {
throw new TransformationException(e);
}
}
@Override
protected Class<String> getSourceType() {
return String.class;
}
@Override
protected Class<Object> getTargetType() {
return Object.class;
}
@Override
public int getWeight() {
return 30;
}
@Override
public String getSourceDataBinding() {
return XMLStringDataBinding.NAME;
}
@Override
public String getTargetDataBinding() {
return JAXBDataBinding.NAME;
}
}
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